/*
 * Copyright 2011 Clean GWT
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
 * in compliance with the License. You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software distributed under the License
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 */
package com.cleangwt.validation.client;

import com.cleangwt.user.client.DefaultPendingHandler;
import com.cleangwt.user.client.PendingHandler;
import com.google.gwt.user.client.ui.UIObject;

/**
 * The deferred error reporter for {@link DeferredValidation}.
 * 
 * @author Jess
 * @version 1.0
 * @since 1.0
 */
public class DeferredErrorReporter {
  private Validator validator;
  private ValidationContext context;

  /**
   * Creates a deferred error reporter with the given validator and context.
   * 
   * @param validator
   * @param context
   */
  DeferredErrorReporter(Validator validator, ValidationContext context) {
    this.validator = validator;
    this.context = context;
  }

  /**
   * The validation callback.
   * 
   * @param errorMessage the validation result
   */
  public void reportErrorMessage(String errorMessage) {
    validator.updateContextError(context, errorMessage);
  }

  /**
   * Creates a pending handler for deferred validating.
   * 
   * @return the {@link PendingHandler}
   */
  public PendingHandler createPendingHandler() {
    PendingHandler pendingHandler = null;
    if (context.hasInput()) {
      pendingHandler = new DefaultPendingHandler((UIObject) context.getInputs()[0]);
    }
    return pendingHandler;
  }

}
